Skip the auto shop - Our mechanics make house calls

Q: Big fan never comes on. If I run the AC, the smaller fan comes on.

asked by on

Radiator fan never comes on

My car has 333000 miles.
My car has an automatic transmission.

Hello, thanks for writing in. If the fan never comes on then the circuit needs to be tested. This can be caused by the wiring or by the fan itself. I usually start by testing the fan with an ohm meter. If the reading is off then the fan needs to be replaced. If the fan is fine then the circuit needs to be tested to see if the fan is losing voltage. If it is then it may have a blown fuse or it may have a relay or computer issue. If you want to have this looked at or repaired, consider YourMechanic, as a certified mechanic can come to your home or office to inspect the issue for you and make or suggest any repairs.

Was this answer helpful?
Yes
No
Thank Robert
Services recommended for this issue
Electric Problems Inspection
click for details

Need advice from certified mechanic? Get help now!

Ask question
Over 1000 mechanics are ready to answer your question.
Pontiac
2003
V6-3.4L
fans
Radiators
Montana
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
Related Questions
Q: Engine makes weird noise
by Alexander M
Q: My truck keep cutting off I changed the fuel injector and it still cutting off like its not getting gas I don't know
by Charles
Q: Rebuilt engine, oil light on, stalling, traction control
by Angela D
Q: AC malfunction
by Amelia L
Q: Car overheated
by Faith S
Q: I changed the plugs and plug wires and changed oil on my van and now it won't start
by Damon

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: speed guage stuck on 0 car will not pick up speed tranmission not shifting correctly and car cuts off sometimes at traffic lights

Hello. If the speedometer is not working correctly and it is shifting like this then the vehicle speed sensor is usually the problem. I would test this first. If the computer is not seeing a speed signal then it will...
Read more

Q: Rear window not staying up

Hi, this could be a number of different things. I will give you a couple reasons. It could be the window regulator stopped functioning or the electrical system could have stopped working in the window motor. The fuse and wiring...
Read more

Q: Rev to start and keep above 2000 rpms when idling to avoid stalling

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve is a small valve on the engine's intake system that...
Read more

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Read more
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Read more
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
Read more

Browse other content

Estimates
Cities
Services
Maintenance